Question

(a) List any two main characteristics of protochordates.

(b) In which class would you place any organism which has-

(i) four chambered heart and lay eggs.

(ii) skeletons made of both bones and cartilage and are cold-blooded.

Answer 1

protochordates include urochordata and cephalochordata.
urochordata are having notochord only in their
tails and lost after they grow into adults.
cephalochordata are having notochord that extends into the head region.
they possess all the chordate characters till the end of their life span.

birds are having four chambered heart and lay eggs.

amphibians.

Answer 2

Answer:

A)

1.True brain or skull is absent.

2.True heart and kidney is absent.

3.They all are marine and small animals.

B) AVES

MARK AS BRAINLIEST PLEASE